EP2722014A1 - Dispositif d'ostéosynthèse - Google Patents

Dispositif d'ostéosynthèse Download PDF

Info

Publication number
EP2722014A1
EP2722014A1 EP13188636.8A EP13188636A EP2722014A1 EP 2722014 A1 EP2722014 A1 EP 2722014A1 EP 13188636 A EP13188636 A EP 13188636A EP 2722014 A1 EP2722014 A1 EP 2722014A1
Authority
EP
European Patent Office
Prior art keywords
axis
legs
osteosynthesis device
radial direction
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13188636.8A
Other languages
German (de)
English (en)
Inventor
Henry Prof. Dr. Halm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Silony Medical International AG
Original Assignee
Silony Medical International AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Silony Medical International AG filed Critical Silony Medical International AG
Publication of EP2722014A1 publication Critical patent/EP2722014A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/04—Force
    • F04C2270/042—Force radial
    • F04C2270/0421—Controlled or regulated

Definitions

  • the invention relates to an osteosynthesis device with a bone screw with a groove having a clevis with two legs, e.g. for a to be inserted into the groove of the fork head between the two legs support rod, wherein the inner sides of the legs of the fork head are provided with an internal thread.
  • a bone screw has become known with which a grooved rod can be fixed against rotation.
  • the bone screw on a clevis, in the groove of the grooved rod can be inserted.
  • the groove base is with longitudinal grooves provided, which establish a positive connection with the rod.
  • a cap nut is screwed onto the fork head and clamped with this rod in the groove bottom.
  • cap nut has the advantage that when fixing the grooved rod in the clevis, the two legs of the fork head can not be bent outward, since they are encompassed by the cap nut.
  • the bone screw requires a lot of space for this purpose.
  • An osteosynthesis device with the features of the preamble of claim 1 is known from US 2005/0216000 A1 and from US 2010/0087874 A1 ,
  • the invention has the object of developing an osteosynthesis device of the generic type such that with the grub screw on the one hand high holding forces can be transmitted, and on the other hand, no opposing stresses in the legs of the clevis are generated.
  • the side facing away from the groove base flank can increase linearly or curved in the radial direction.
  • the bend can be progressive or degressive.
  • flanks are connected to each other via a threaded portion which extends straight or curved.
  • the straight threaded portion preferably extends parallel to the axis in one embodiment.
  • the distance of the threaded portion starting from the axis of the bone screw in the radial direction and seen in the direction of the free ends of the legs, decreases or decreases. On In this way, the distance between two threads is increased at the bottom, whereby the risk of breakage or the risk of a thread break is significantly reduced.
  • a development of the invention provides that the dimension of the threaded section extending in the direction of the axis corresponds to a maximum of 75%, in particular 50% and preferably 40%, of the thread pitch. As a result, the material is used optimally in the legs of the fork head.
  • a further development of the osteosynthesis device provides that a grub screw to be screwed in between the legs is provided which has an external thread engaging in the internal thread, which has a diamond-shaped cross-section and an edge facing away from the groove base, which, starting from the axis of the grub screw in the radial direction and seen in the direction of the free ends of the legs, is inclined.
  • this grub screw the two legs of the fork head are not spread apart but pulled towards each other. The two flanks are pressed against each other until the beginning of the plastic deformation, in particular when the flanks of the grub screw and the flanks of the fork head lie flat against each other.
  • the thread of the grub screw is complementary to the thread of the clevis.
  • the surface of at least one of the flanks is smooth and / or coated with a lubricant, so that the grub screw can be screwed in smoothly.
  • the groove base is rounded in the transition to the flank, as a result of which the formation of cracks is greatly reduced.
  • FIG. 1 shows a first embodiment of the invention, generally designated 10 osteosynthesis device with a bone screw 12, a merely vaguely illustrated correction or support rod 14 and a grub screw 16. From the bone screw 12, only the clevis 18 is shown, which merges down into the threaded portion, which has the thread to be screwed into the bone.
  • the threaded part may protrude integrally from the clevis or be designed as a separate component.
  • the clevis 18 has two legs 20.
  • the two legs 20 form a groove 22 which has a groove bottom 24.
  • This groove bottom 24 is usually with a Provided surface profiling and also optionally serves to receive a pressure piece for the separate threaded part and for receiving the correction and support rod 14 which is held by the grub screw 16.
  • This grub screw 16 is screwed into the clevis 18, which for this purpose has a total of 26 designated internal thread.
  • This internal thread 26 is configured trapezoidal in cross-section, wherein the side facing away from the groove bottom 24 upper edge 28 of the axis 30 of the bone screw 12 increases seen in the radial direction.
  • the inclination angle ⁇ of the upper flank 28 is thus greater than zero and is between 5 ° and 10 °, in particular 8 °.
  • the lower edge 32 of the internal thread 26 is orthogonal to the axis 30th
  • the grub screw 16 has a generally designated 32 external thread, which corresponds to the internal thread 26 of the fork head 18, in particular is complementary to this.
  • FIG. 2 shows an enlarged section of a female thread according to another embodiment of the invention. It is clearly recognizable to the axis 30 by the angle ⁇ inclined threaded portion 38.
  • the internal thread 26 is rounded in the transition 42 from the threaded portion 38 to the flanks 28 and 32.
  • the lower edge 32nd extends orthogonal to the axis 30.
  • the distance of the axis 30 to the angle ⁇ inclined threaded portion 38 takes in the FIG. 2 , seen from the axis 30 of the bone screw 12 in the radial direction and in the direction of the free ends of the legs 20, to.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Neurology (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
EP13188636.8A 2012-10-18 2013-10-15 Dispositif d'ostéosynthèse Withdrawn EP2722014A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012219050 2012-10-18
DE102012219350.2A DE102012219350A1 (de) 2012-10-18 2012-10-23 Osteosynthesevorrichtung

Publications (1)

Publication Number Publication Date
EP2722014A1 true EP2722014A1 (fr) 2014-04-23

Family

ID=49488466

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13188636.8A Withdrawn EP2722014A1 (fr) 2012-10-18 2013-10-15 Dispositif d'ostéosynthèse

Country Status (2)

Country Link
EP (1) EP2722014A1 (fr)
DE (1) DE102012219350A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989284A (en) * 1975-04-23 1976-11-02 Hydril Company Tubular connection
DE4316542C1 (de) 1993-05-18 1994-07-21 Schaefer Micomed Gmbh Osteosynthesevorrichtung
DE29810798U1 (de) 1998-06-17 1999-10-28 SCHÄFER micomed GmbH, 73035 Göppingen Osteosynthesevorrichtung
EP1449486A1 (fr) * 2003-02-19 2004-08-25 Spinal Innovations, LLC Implant avec profil de filet autoblocant
US20050216000A1 (en) 2004-03-22 2005-09-29 Innovative Spinal Technologies Closure member for a medical implant device
US20060009773A1 (en) * 2002-09-06 2006-01-12 Jackson Roger P Helical interlocking mating guide and advancement structure
US20100087874A1 (en) 2005-12-21 2010-04-08 Jong Wuk Jang Pedicle screw
DE202011051539U1 (de) * 2011-10-05 2011-11-03 Aesculap Ag Nachjustierbare polyaxiale Pedikelschraube
US20110278838A1 (en) * 2008-12-16 2011-11-17 Sumitomo Metal Industries, Ltd. Tubular connection with self-locking threading used in the oil industry

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29903342U1 (de) * 1999-02-24 1999-06-02 Grzibek, Egbert, 97534 Waigolshausen Fixierelement für Halteelemente von Wirbelsäulenimplantaten
WO2006052796A2 (fr) * 2004-11-10 2006-05-18 Jackson Roger P Guide helicoidal et rebord de glissement comportant des prolongements cassables

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989284A (en) * 1975-04-23 1976-11-02 Hydril Company Tubular connection
DE4316542C1 (de) 1993-05-18 1994-07-21 Schaefer Micomed Gmbh Osteosynthesevorrichtung
DE29810798U1 (de) 1998-06-17 1999-10-28 SCHÄFER micomed GmbH, 73035 Göppingen Osteosynthesevorrichtung
US20060009773A1 (en) * 2002-09-06 2006-01-12 Jackson Roger P Helical interlocking mating guide and advancement structure
EP1449486A1 (fr) * 2003-02-19 2004-08-25 Spinal Innovations, LLC Implant avec profil de filet autoblocant
US20050216000A1 (en) 2004-03-22 2005-09-29 Innovative Spinal Technologies Closure member for a medical implant device
US20100087874A1 (en) 2005-12-21 2010-04-08 Jong Wuk Jang Pedicle screw
US20110278838A1 (en) * 2008-12-16 2011-11-17 Sumitomo Metal Industries, Ltd. Tubular connection with self-locking threading used in the oil industry
DE202011051539U1 (de) * 2011-10-05 2011-11-03 Aesculap Ag Nachjustierbare polyaxiale Pedikelschraube

Also Published As

Publication number Publication date
DE102012219350A1 (de) 2014-04-24

Similar Documents

Publication Publication Date Title
DE29810798U1 (de) Osteosynthesevorrichtung
EP2481939B1 (fr) collier de serrage
EP3464980B1 (fr) Collier de serrage de flexible
WO2014005899A1 (fr) Élément de compensation de tolérances
DE102012221228A1 (de) Toleranzausgleichsvorrichtung
EP2921757B1 (fr) Collier profilé
DE3249120C2 (fr)
WO2016012081A1 (fr) Dispositif de fixation d'un rail de montage
EP2292988A2 (fr) Dispositif de fixation pour la fixation de panneaux solaires sur un rail de montage
WO2013139641A1 (fr) Système de montage de raccords vissés à bague coupante pour tuyaux
EP1767793A2 (fr) Dispositif de fixation pour la fixation des panneaux solaires à un rail d'assemblage
EP3721102B1 (fr) Écrou en deux parties présentant une force de pression élevée
WO2016193013A1 (fr) Dispositif de fixation d'une pièce rapportée sur une pièce de support
DE19946890C2 (de) Halteelement zur unverlierbaren Halterung von Kopfschrauben
DE4409765C2 (de) Rohrbefestigungsvorrichtung
DE102008036386B4 (de) Rohrschelle und Profilelement für eine Rohrschelle
DE19602523C1 (de) Kabelschuh für den elektrischen Anschluß eines Kabels
WO2015185396A1 (fr) Dispositif de fixation servant à fixer un objet sur une paroi et système de fixation
EP2933541B1 (fr) Dispositif de liaison à vis destiné à relier deux tuyaux
EP2722014A1 (fr) Dispositif d'ostéosynthèse
DE102010032895B4 (de) Verankerungssystem
DE1056878B (de) Befestigungsglied mit unverlierbar zugeordnetem Federring
DE20202456U1 (de) Rohrschelle
DE3441562A1 (de) Rohrschelle
EP2221490B1 (fr) Elément de fixation en une pièce destiné à l'agencement d'un élément de tiges sur un rail de montage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SILONY MEDICAL INTERNATIONAL AG

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20141024